Jessie Yu created SPARK-20459:
---------------------------------
Summary: JdbcUtils throws IllegalStateException: Cause already
initialized after getting SQLException
Key: SPARK-20459
URL: https://issues.apache.org/jira/browse/SPARK-20459
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.1.0, 2.0.2, 2.0.1
Reporter: Jessie Yu
Priority: Minor
Testing some failure scenarios, and JdbcUtils throws an IllegalStateException
instead of the expected SQLException:
{code}
scala>
org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils.saveTable(prodtbl,url3,"DB2.D_ITEM_INFO",prop1)
17/04/03 17:19:35 ERROR Executor: Exception in task 0.0 in stage 1.0 (TID 1)
java.lang.IllegalStateException: Cause already initialized
.at java.lang.Throwable.setCause(Throwable.java:365)
.at java.lang.Throwable.initCause(Throwable.java:341)
.at
org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$.savePartition(JdbcUtils.scala:241)
.at
org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$$anonfun$saveTable$1.apply(JdbcUtils.scala:300)
.at
org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils$$anonfun$saveTable$1.apply(JdbcUtils.scala:299)
.at
org.apache.spark.rdd.RDD$$anonfun$foreachPartition$1$$anonfun$apply$28.apply(RDD.scala:902)
.at
org.apache.spark.rdd.RDD$$anonfun$foreachPartition$1$$anonfun$apply$28.apply(RDD.scala:902)
.at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1899)
.at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1899)
.at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
.at org.apache.spark.scheduler.Task.run(Task.scala:86)
.at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
.at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1153
.at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628
.at java.lang.Thread.run(Thread.java:785)
{code}
The code in JdbcUtils.savePartition has
{code}
} catch {
case e: SQLException =>
val cause = e.getNextException
if (cause != null && e.getCause != cause) {
if (e.getCause == null) {
e.initCause(cause)
} else {
e.addSuppressed(cause)
}
}
{code}
According to Throwable Java doc, {{initCause()}} throws an
{{IllegalStateException}} "if this throwable was created with
Throwable(Throwable) or Throwable(String,Throwable), or this method has already
been called on this throwable". The code does check whether {{cause}} is
{{null}} before initializing it. However, {{getCause()}} "returns the cause of
this throwable or null if the cause is nonexistent or unknown." In other words,
{{null}} is returned if {{cause}} already exists (which would result in
{{IllegalStateException}}) but is unknown.
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